La commande 'netcdctrl' permet de contrôler les informations contenues dans le cache du démon 'netcd'.
La syntaxe de base est la suivante :
# netcdctrl -t dns -e hosts -a /tmp/cacheDNS.log
Cette commande permet de stocker dans le fichier /tmp/cacheDNS.log les informations du cache de type DNS et pour les entrées Hosts( Seule option disponible avec le type 'NDS')
Le démon netcd doit être actif( Vérifier avec 'lssrc -s netcd')
Le fichier de configuration du démon netcd est /etc/netcd.conf, qui peut contenir une seule ligne telle que la suivante :
cache dns hosts 128 60
Purpose
Manages the network caching (netcd) daemon caches.
Syntax
netcdctrl [ -t type -e type [ -a file | -b file | -f | -s file ]] [ -l level ] [ -h ]
Description
The netcdctrl command provides the following functions:
- Dumps specific caches in ASCII format: provides a readable output of the caches content.
- Dumps specific caches in binary format. The binary format can be used later to reload the caches when starting the netcd daemon. Dumping avoids reloading the caches from the beginning.
- Displays statistics on caches use. The caches are tables, and the access to these tables is controlled by a hash algorithm. This output helps you size the table for a given resolution and a given map using the netcd configuration file.
- Flushes specific caches. The content of the specified caches are erased, and local caches are then reloaded. Other caches are reloaded by resolver's responses.
- Changes the logging level dynamically.
Requirement: Il faut posséder les droits 'root' pour lancer cette commande.
Flags
| Item | Description |
| -a file | Specifies ASCII dumping of the specified caches. |
| -b file | Specifies binary dumping of the specified caches (local caches are not dumped). |
| -e type |
Specifies the map. The type parameter can be one of the following values:
Use this flag only with the -b, -a, -f and -s flags. |
| -f | Flushes the specified caches. |
| -h | Displays help information. |
| -l level | Changes the logging level of the netcd daemon. The level value must be an integer of 0 through 7. |
| -s file | Provides statistics on caches use. |
| -t type |
Specifies the resolution. The type parameter can be one of the following values:
Use his flag only with the -b, -a, -f and -s flags. |
Examples
- To flush all the caches, enter:
netcdctrl -t all -e all -f
- To dump all the NIS caches in binary format, enter:
netcdctrl -t nis -e all -b /tmp/netcd_nis_binary_dump
- To dump the local cache for hosts in ASCII format, enter:
netcdctrl -t local -e hosts -a /tmp/netcd_dns_hosts
- To set the level of logging to obtain all possible traces, enter:
netcdctrl -l 7
